Gravity bag filters load solid waste efficiently and are easily cleaned. These bags are inexpensive, very durable and eliminate the need for post mechanical filtration with many applications.

The pleasure of eating rehydrated shrimp cocktail, or trying to stuff a urine bag, against gravity, into the wet-trash container, was open not only to five or six well-trained astronauts and pilots.

Filling operations for drains of Ruoergai arctic-alpine wetland have such four types as damming with bag filling with earth and rock, earth and rockfill dam, concrete gravity dam and model dam.